Sectional asbestos covering.



l UNITED STATES PATENT OFFIOE. y

WILLIAMS J'. MOEIIZJ'JER., QF HARTWELL, OHIO, ASSIGNOR TO THE PHILIPCAREY MANU- FACTURING COHPANY, F LOCKLAND, OHIO, A CORPORATION 0F OHIO.

d i i SECTIONAL ASBESTOS COVERING'.

Specification of Letters Patent.

Applicationled March 7, 1908. Serial No. 419,640

and useful Improvements in Sectional Asbestes Coverings, of which thefollowing 'is a specification.

My invention relates to insulating coverings, the object being toprovide such coverings of asbestos in sections of elongated formationreinforced longitudinally against -1nay occur in handling.

breakage and separation of their parts which The asbestos in suchcoverings is usually porous and felted in character. 4

My invention consists in the Acombination with such a section ofasbestos insulating covering, of a reinforcement bar extending in'general direction longitudinally ofthe sectionlnd embedded therein andhaving projections extending transversely thereof, as will hereinafterbe more fully described.

In the drawing: Figure l is a perspective view of one of the sections,the reinforcement bars being indicated by dotted lines.v

Fig. 2 is a detail perspective view illustrating the formation of one ofthe reinforcement bars illustrated in Fig. 1. Fig. 3 is a cross sectionon a line corresponding to w-w -of F ig.` l, the reinforcementbars beingshown in elevation, and the section or block of asbestos covering beingrepresented as broken, but held against separation of its parts by thereinforcement bars. '-F ig. 4 is a detail perspective view of part of areinforcement bar of modified formation. F ig. 5 is an end elevation ofa section or block of asbestos covering in which reinforcement bars ofthe Vformation illustrated in F ig. 4 are used, these reinforcement barsbeing represented by .dotted lines. Fig. 6 is a cross section on a linecorresponding to y-y of Fig. 5, the reinforcei'nent bars being shown inelevation. Fig. 7 is a detail perspective view illustrating part of areinforcement bar i of another modified. formation. Fig. 8 is a planview of a section or block of asbestos covering in which reinforcementbars similar to .those illustrated in Fig. I.71'are used. Fig. 9 is anend elevation of -asection of asbestos covering in which reinforcementbars l similar to those illustratedin Fig. 7 are used.

As an example ofthe vu'se of my invention,v

I have illustrated in the various figures 'of the drawing, sections orblocks of asbestos covering of segmental formation such as are usuallemployed in covering'steam pipes or boi ers, or other convex surfacesrequired to be insulated for retaining the heat in them, these sectionsor blocks being of considerably greater length than of width andthickness. Owing to the fragile nature of the asbestos forming suchsections orl blocks, and to the necessity of handling the blocks inapplying them to the surfaces, it is desirable that they be reinforcedagainst the decovering beineF applied, as it is, in sections, and beingheId upon the surface by additional means, such as sheeting or hoops, orboth, a simple fracture such as the one illustra'ted in Fig. 3 ofthedrawing will not be of great consequence if the block is held togetherlongitudinally aft the fracture, since the sectional nature nf hestructure of the complete covering primarily involves the presence ofjoints between the various sections, 'and a'n additional joint, whichthe meeting of the parts of the broken section at the fracturepractically constitutes, does not materially reduce the eiiiciency ofthe covering. It is for this reason that I provide my improved sectionalasbestos covering with reinforcement bars running longitudinally oftheelongated sections to reinforce them tions extending substantiallytransversely of the sections, which will prevent movement-of parts ofthe sections in a direction parallel to the general direction of thereinforcenot so essential, inasmuch yas lthe block is thickness and notso subject to fracture longitudinally, as to transverse fracture, suchasjthe fracture 4 illustrated in Fig. 3 of Patented Nov. 16, 1909.

against transverse fracture, with projec-.

However, it should .bel nf'ged that the transverse reinforcement 1s-lrnarrow in proportion to its length and structive effects of suchhandling. This l ment bars. Thus, in Fig. 1, the elongated/ A ly Atakestheforin of a channell and thus .constivthus be the equivalent of thereinforcement the drawing. 'it will be readily understood, by referringto Fig.- 3 of the drawing that, although theblocks should be fracturedas illustrated, the parts 5 and 6 of the block formed by the fracturecannot separate owing to the angular extensions constituted by the hooksB on,the reinforcement bars The reinforcement bars 2 are preferablycomposed of wire, which is. embedded in the asbestos when the blocks aremade, and are of such thickness that. they are sufficiently rigid 'toform an etlicient stay or reinforcenient to the block. However, althoughit is desirable that the reinforcement, bars be rigid enough to preventthe transversey fracture of the block, it is also desirable that theweight otn theblocks be not increased disproportionately, and to providefor this requirement, a reinforcement bar of the for-1 mationillustrated in Fig. ft may be used, which consists in a strip 7, ofsheet metal, curved transversely at and ,9, so that it tutes a light andrigid reinforcement of the block longitudinally, when applied alsillustrate'd in Figs. 5 and (3. ln order that the reinforcement bars Tmay le angulated and bars 2 illustrated in Figs. l, 2 and 3 of thedrawing, it, provided with recesses oi' notches it), so that betweenthese recesses or notches, angular extensions 1l are left which presentedges or surfaces l2 disposed transversely of the block and consequentlyat right angles totlie general direction of the reinforcement bars 7, sothatthey will effectually prevent: movement of parts of the asbestosblock parallel to the reinforcement bars 7 in case of transversefracture. In the fui-ther modification illustrated in Figs. 7, 8 and 9of the drawing, the reinforcements are constituted by sinua'ted Wires13, the sinuations 14 of which constitute projections extendingtransversely `of the block, so that they are equivalent. to theprojections 3 and 11, of the' reinforcement bars 2 and 7 respectively,illustrated in the preceding figures of the drawing.

In any of the equivalent formations, illustrated in the drawing andhereinbefore dei scribed, it will be ,noted that 'the reinforcement barsterminate short of the ends of the asbestos blocks so that saidreinforcement bars are completely inclosed' in the blocks.

This complete inclosure of the metallic reinforcement bars is desirableso that the smoothness o'f/the ends of the sections, where joints mustbe 4formed in laying the l o locks,` Willbe insured. Asbestos blocksreinforced according to myinvention Will not only more etfectuall iresist the damagingr effects of the handling from the place ofmanufacture where they arevto be used, an( in laying them upon thesurface to be insulated, but

vthis reinforcement is also useful when it becomes necessary to removetheblocks from thc boilery or steam pipe to make repairs.

In' the case of removal of the asbestos blocks, especially after theyhave been in use upon the boiler or steam pipe for a considerable lengthof time, the asbestos .composing the blocks has deteriorated. Thisdeterioration, although it increases the insulating qiiality to theplaceof the covering rather than decreases it, resuits in the part iclesof the asbestos, compos ing the" section or block, becoming incoherAent, to the extent that the removal of the sections or blocks for thepurpose of repaAirs to the surface which they have been covering Withoutbreaking or destroying them is rendered difficult, unless they arereinforced as herein set forth.` Y

Having fully described my invention,ivhat l claim as new and desire tosecure by Letters Patent is:

v-Ars a `new article of manufacture, a section of asbestos insulatingcovering comprising porous and felted material formed of one piece incombination with a reinforcement bar extendingin general directionlongitudinally of said section and embedded therein, said reinforcement.bar having 'rejections extending transvierselythereo substantiallyV asset forth and for the purposes specified.. .I

Y WILLIAM MOELLER,

` YWitnesses:

W. H. Sociais,- E. G. Ross.

